references in the same place

[Anonymous]

Hi,

Is there a possibility to check if references (say familyreferences of different instances placed in a model) are parallel and in the same place/overlapping?

regards,

Raymond

[jeremytammik]

Dear Raymond,

Thank you for your query.

Yes, of course.

Each family instance has an insertion point and a rotation.

The insertion point may be handled differently depending on the type of family definition and instance placement type, e.g., face or curve hosted, etc.

Please provide a more detailed example of your exact situation, and I am sure it can be easily solved.

You can also retrieve the family instance placement transformation from its geometry, by accessing the GeometryInstance Transform property:

http://www.revitapidocs.com/2018.1/99cb4580-9b59-6564-8181-6082f275a869.htm

That will probably provide a more generic possibility to compare the properties you are after.

I hope this helps.

Best regards,

Jeremy

[Anonymous]

Hi Jeremy,

I would like to compare the references of facebased familyinstances. If
they are in line (say vertically) and 4 instances are placed I would like
to return 1 reference instead of 4.

[jeremytammik]

Dear Raymond,

Thank you for your update.

Yes, well, what I already said above still applies.

You can use the insertion point and direction for some basic comparison.

If you need more than that, you can analyse and compare the respective GeometryInstance Transform property values.

Best regards,

Jeremy

[Anonymous]

Correct me if I am wrong, but a reference does not have a direct accessible
direction. Is there a way to retreive the direction of the reference (other
than using FAIR59 example in another post)?

[jeremytammik]

Dear Raymond,

  doc.GetElement( Reference.ElementId ).GetGeometry( new Options )

returns the family instance element geometry.

It contains a GeometryInstance, which has a Transform, which determines a coordinate system including a direction.

Cheers,

Jeremy